[ActivityTrigger] parameter named "data" causes error on local startup

Here's the method:

[FunctionName(nameof(DoActivity))]
public static async Task DoActivity([ActivityTrigger]string data, ILogger log)
{
log.LogInformation($"hashing {data}");

return data.GetHashCode().ToString();
}

Here's the error that appears in the console window:

[7/20/2019 6:01:27 PM] Microsoft.Azure.WebJobs.Host: Error indexing method 'DoActivity'. Microsoft.Azure.WebJobs.Host: Can't bind parameter 'data' to type 'System.String'.
[7/20/2019 6:01:27 PM] Error indexing method 'DoActivity'
[7/20/2019 6:01:27 PM] Microsoft.Azure.WebJobs.Host: Error indexing method 'DoActivity'. Microsoft.Azure.WebJobs.Host: Can't bind parameter 'data' to type 'System.String'.

When parameter "data" is renamed to, say, "info" the error goes away.